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Finding the Fourth Proportional to 21,597.68, 29,794.61 and 12,639.63

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Solution

The fourth proportional to 21,597.68, 29,794.61 and 12,639.63 is: 17,436.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,597.68 : 29,794.61 = 12,639.63 : x
  2. Step 2: Convert to fraction form
    21,597.68/29,794.61 = 12,639.63/x
  3. Step 3: Cross multiply
    21,597.68x = 29,794.61 × 12,639.63
  4. Step 4: Simplify right side
    21,597.68x = 376,592,783.20
  5. Step 5: Solve for x
    x = 376,592,783.20/21,597.68
  6. Step 6: Final answer
    x = 17,436.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.